Question # 1

The compund formed by oppoite charges are known as.

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Metallic solids

Ionic compounds

Non-polar Covalent compound

None of the above

N-shell contains number of subshells.

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1

3

4

2

Every atom has a natural tendency to accommodate electrons in its valence shell

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2 or 6

2 or 4

2 or 8

2 or 10

The elementss of group 1 and 2 are placed in which block

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s

p

d

f

Such reaction which continue in both directins are called.

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Dynamic

Irreversible

Reversible

Non- reactive

Why the gas starts coming out when you open a can of fizzy drink.

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Because gteh solubiliyt of the gas increases

Because the gas is dissolved under pressure hence it comes out when pressur eis decreased

Becaue the gas is insoluble in water

Because the solubility of hte gas decreases at high pressure.

Aerobic respiration releases........energy than anaerobic respiration.

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Equal

Less

More

None of these

Which one of the suspension.

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Chalk in water

Tootpast

Ink

Blood

Water has high boiling point as compared a alcohol due to

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Low density

High surface tension

Hydrogen bonding

High vapour pressure

What information was obtained fom discharge tube expriments?

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Electrons and protons were discovered

Structur eof atom was discovered

Neutrons and protons were discovered

Presence of nucleus in an atom was discovered

All Acids turn blue litmus.

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Pink

White

Colourless

Red

How many covalent bonds does C₂H₂ molecule have.

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Two

Three

Four

Five

John Dalton put forward his atomic theory.

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1800

1803

1805

1903

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